Flora of North America species comparison

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Layia chrysanthemoides

smooth tidy tips
Habit Plants 4–53 cm (self-incompatible); not glandular, not strongly scented.
Stems

not purple-streaked.
Leaf

blades lanceolate or oblanceolate to linear, 5–120 mm, margins (basal leaves) lobed to pinnatifid.
Involucres

hemispheric or depressed-hemispheric, 4–12 × 4–14+ mm.
Ray florets

6–16;

laminae usually proximally yellow, distally white or light yellow, rarely uniformly yellow throughout, 3–18(–24) mm.
Disc florets

28–100+;

corollas 3–5 mm;

anthers ± dark purple.
Phyllaries

6–16, apices often longer (sometimes shorter) than folded bases.
Ray cypselae

glabrous.
Paleae

subtending ± all disc florets.
Disc

pappi 0 or of 2–18 tawny, subulate to setiform, unequal scales 1–4 mm, each ± scabrous, not adaxially woolly.
2n

= 16.

Layia chrysanthemoides
Phenology Flowering Mar–Jun.
Habitat Grasslands, open woodlands, often valley bottoms, disturbed sites, edges of vernal pools, waterways, and salt marshes, usually on heavy soils, sometimes ± alkaline or saline
Elevation 0–800 m (0–2600 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Layia chrysanthemoides occurs from the western Great Valley to the coast in northern and central California. Molecular and morphologic data have indicated that L. chrysanthemoides is most closely related to L. fremontii (B. G. Baldwin, unpubl.); the two species are reportedly highly interfertile (natural hybrids have not been reported; J. Clausen 1951).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 21, p. 265.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Madiinae > Layia
Sibling taxa
L. carnosa, L. discoidea, L. fremontii, L. gaillardioides, L. glandulosa, L. heterotricha, L. hieracioides, L. jonesii, L. leucopappa, L. munzii, L. pentachaeta, L. platyglossa, L. septentrionalis
Synonyms Oxyura chrysanthemoides, L. chrysanthemoides subsp. maritima
Name authority (de Candolle) A. Gray: Proc. Amer. Acad. Arts 7: 360. (1868)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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